Self-Aligning Ball B. SKF 2203 ETN9

The SKF 2203 ETN9 self-aligning ball bearing with a 17 mm bore compensates for angular misalignment and houses two rows of balls in a lightweight polyamide cage.

The SKF 2203 ETN9 self-aligning ball bearing is a double-row rolling bearing made from standard bearing steel (100Cr6) with a common hollow-ball raceway in the outer ring. This design enables the inner ring, together with the ball rings, to automatically compensate for misalignment and shaft deflection during operation. With key dimensions of 17 mm bore diameter, 40 mm outer diameter and 16 mm width, this open bearing complies with tolerance class P0/PN or ABEC 1.

What is the 2203 ETN9 self-aligning ball bearing suitable for?

Design engineers and maintenance technicians select this bearing type primarily for shaft guides where misalignment occurs between the bearing positions or where shaft deflection arises under radial loads. The double-row bearing primarily absorbs radial forces, supports shafts with cylindrical bearing seats and compensates for static and dynamic angular misalignments. Typical applications include bearing arrangements with flexible or long shafts.

What are the distinctive features of the polyamide cage in this variant?

The suffix ETN9 indicates the version with a polyamide cage, which precisely maintains the spacing between the two rows of balls. This material reduces the rolling bearing’s own weight and promotes smooth, low-friction operation. The bearing is designed for a temperature range of -30 to +120 degrees. As this is an open bearing without a seal, the bearing housing requires an external lubricant as well as protection against the ingress of contaminants.